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Plasma tv I have a plasma TV Philips model no: 50PF7320A. The symptom is the unit has audio but no video(no light on the screen)

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  • villacom May 19, 2008

    Thank you,for helping me. One of your experts ask for more information about the Philips tv model no: 50pf7320a. the tv has audio but no video(no light on the screen), the screen is good and I change the small signal panel already.

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Ok first i have to ask when u turn sound off on TV and get close to the TV does it make a buzzing noise ? If so u have a damaged Plasma panel .
If this is not the problem you could have a bad logic or y-main (most common problem) will need to perform a white screen test on the plasma panel to verify this is the problem.
This is what u need to do
1. Remove the back panel of the TV.
2. Remove the Small Signal Board bracket ( the two long bars on back of the plasma panel, the bracket that is connecting the two with SSB on it, remove this and disconnect the connectors to the power supply (CN1M02,CN1M03, CN1M45)except for the main power plug in you will still need this)
3. Once u remove the SSB bracket you should see a plasma panel resembling pic 1.
4. Place a jumper wire or connect the two pins (CN 2012) on the logic board located underneath the SSB bracket.
5. Also place jumpers on the power supply (J8003 and J8004)
6. Now plug in the power supply, U should hear the relays click and after 5-10 sec you should see a green led on power supply, and 2 green leds on logic board 1 will be solid and 1 will flash.
With this set up you should get a white screen on your TV this will let you know if the panel is bad or not.
Also forgot to ask have u had this TV worked on recently or this just happen for no reason.

Posted on May 10, 2008

  • James Peters
    James Peters May 10, 2008


    General picture of a Samsung plasma panel (50HDv4)

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http://www.p4c.philips.com/cgi-bin/dcbint/cpindex.pl?ctn=50PF7320A/37&scy=US&slg=AEN&searchtxt=50PF7320A
Your rating to my answer is highly appreciate
Thanks

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